The result is equally scattered 'white' light from the sun and therefore we see white clouds. ... The clouds may be semi-transparent which allows the background blue sky to be seen through the cloud.

When the Sun is high in the sky, it appears its true colour: white. ... you can see the blue sky fade away to a black background as it climbs above the atmosphere.

When the Sun is high in the sky, this is why the entire sky is blue. It appears a brighter blue the farther away from the Sun you look, because there's more atmosphere to see (and therefore more ...

Since the sun's evening light travels through much more of our atmosphere than when the sun is higher in the sky, by the time it reaches us it has lost much of its blue component through Rayleigh ...

The sun is also at a higher angle, so there is more scattering of light. Our eyes perceive this as a lighter shade of blue. In the winter, the air is typically drier.

The sun is positioned lower in the sky. As the days get shorter, the sun's path across the sky sinks lower to the horizon. This bumps up the amount of scattered blue light that reaches our eyes on ...